Speedometer Wire

[goalguy02]

Speedometer is not working post SR swap. Yellow with green tracer wire is connected at ECU, but behind the battery at the two plugs I found another yellow green tracer wire. I can't find where this wire should go to? Any help?

[Clawhammer]

Same problem here, let me know what you find out. My speedsensor goes to a plug, on the other side of the plug are the yellow and green wires, then go down into a huge bundle of wires and then split off and go towards what looks like the passenger side fuse/ relay box. I haven't checked on the ECU side...where does it go?

[CoupedUp]

Did you swap out the SR20DET VSS(Vehicle Speed Sensor) for the KA24DE? The PPM(pulses per mile) of the two sensors are different and would be a reason why your Speedometer may not work. Install the KA24DE VSS into the SR20DET transmission.

Also when you go to install the KA24DE VSS, be sure to use teflon tape and RTV to prevent a very common leak.

The Speedometer wire Yellow w/ Green stripe is the friendly converted version for your ECU.

It comes from your gauge cluster(where its converted) through the harness across your dash and down to the dash plug and to your ECU.

The VSS has 2 wires. Yellow w/ Black Stripe and Yellow w/ Blue Stripe. These two wires run through the lower engine harness and then make their way into the gauge cluster and go to your speedometer where it then reads how many PPM there are and outputs it as a usable signal for your ECU, hence the Yellow w/ Green stripe wire.

Hope this helps.

[goalguy02]

Thanks

Did you swap out the SR20DET VSS(Vehicle Speed Sensor) for the KA24DE? The PPM(pulses per mile) of the two sensors are different and would be a reason why your Speedometer may not work. Install the KA24DE VSS into the SR20DET transmission.

Also when you go to install the KA24DE VSS, be sure to use teflon tape and RTV to prevent a very common leak.

The Speedometer wire Yellow w/ Green stripe is the friendly converted version for your ECU.

It comes from your gauge cluster(where its converted) through the harness across your dash and down to the dash plug and to your ECU.

The VSS has 2 wires. Yellow w/ Black Stripe and Yellow w/ Blue Stripe. These two wires run through the lower engine harness and then make their way into the gauge cluster and go to your speedometer where it then reads how many PPM there are and outputs it as a usable signal for your ECU, hence the Yellow w/ Green stripe wire.

Hope this helps.

for the help. I didn't swap speed sensors, but I will while I still can. Thanks again!

[Clawhammer]

I swapped speed sensors. From what I understand, not swapping won't cause it to not work, only to be off since the SR reads km/h. If it doesn't work at all it's not the speed sensor.

[goalguy02]

I swapped speed sensors. From what I understand, not swapping won't cause it to not work, only to be off since the SR reads km/h. If it doesn't work at all it's not the speed sensor.

The speedo worked pre-swap and now it doesn't so its probably in my wiring. Oh well.

[CoupedUp]

I swapped speed sensors. From what I understand, not swapping won't cause it to not work, only to be off since the SR reads km/h. If it doesn't work at all it's not the speed sensor.

That's why I included some wiring info so he can trouble shoot. .

I'm not 100% sure but there may be a difference in lower transmission harnesses in comparison to how/where the VSS wires go to the Engine harness and to the dash.

That is just a maybe, but I'm pretty sure they'll be the same on the lower harness in that regard.

[Clawhammer]

What about auto to 5spd? I did that at the same time as my SR swap. I wish my speedo worked haha.

[Clawhammer]

Goalguy does your odometer work?

[goalguy02]

Goalguy does your odometer work?

I didn't watch the ODO, but my trip doesn't work at all.

[Clawhammer]

Look at your odo next time, none of the three work for me, I bet we have the same problem.

[blinker_fluid]

I used the sr speed sensor and my gauge is accurate, it doesn't matter which is used, sr or ka, if its a s13 motor to s13 chassis. The cluster reads in both mph and kph. The only problems are when its an auto swap or an s14 swap in a s13.

[goalguy02]

Look at your odo next time, none of the three work for me, I bet we have the same problem.

Odometer is not working either. First one to diagnose it wins!

[Clawhammer]

The race is on!

[blinker_fluid]

On the s13 chassis the speed sensor has two wires a yellow/blue and yellow/lavender. They go through the harnes and end up by the the relay box, if it was an auto chassis its a 4 wire plug, if its a manual its a 8 wire plug. The fsm refers to these as e201(auto) and e202(manual). As for the odo I think it goes off of the speed sensor.

[Clawhammer]

Yeah I believe you're right. I'm gonna have all weekend to work on it, hopefully I can figure it out.

[blinker_fluid]

Download the fsm for a usdm s13 and look in the electrical section. The version I have the info is on pg. 43 and traces the wires and colors from the speedometer to the speed sensor and everything in between.

[SRspoolin]

my whole gauge cluster doesnt work. i switched to a dohc cluster and got nothing. i noticed that the harness that goes from the cluster to inside the dash, the clip that plugs into the cluster were messed up. i got a dohc harness from a friend but my car is a 89 so would that work? or do i need another sohc harness?
Modified by SRspoolin at 4:20 PM 3/14/2008

[Clawhammer]

Can someone tell me with a good description or with a pic where the plug that contains the vss wires goes when it comes out of the lower engine harness? I've got 3 possible choices, I'm thinking it was in the wrong one. On the end of the relay box are 2 possible plugs...one brown and one gray right above it. There's another possible one on the long side of the fuse box...which I'm starting to think is it. Help!

[blinker_fluid]

http://www.ka24detdvd.org/file...s.zip

Its the top plug on the side of the relay box, either 4 wires or 8 wires depending on the original transmission. The wires your looking for are all the way to the left side of the plug if the clip is on top and your looking at the plug end, yellow/blue and yellow/lavender. Follow the link up top and download the fsm, in the electrical section look at pg. 101 and 43.

[Clawhammer]

I've got all the FSM's. I found the plug, I need to know what it plugs into on the relay box. On the short end facing the firewall are 3 plugss. At the top is a very small plug (not the right one), then a gray 8 wire plug (where it's originally plugged into) and at the bottom a brown plug the same side.

THEN, over on the long side of the relay box closest to the motor is another plug the same size...which appears to have the same color wires in the same places. **** it I'll just plug it in and see what happens. What's the worst, my car blows up?

[blinker_fluid]

top on the long side between the box and the motor.

[blinker_fluid]

oh crap Ima idiot, I just now realized you got a sohc, I gotta check to see if the wires are different on a dohc

[Clawhammer]

There's only one connection there, so that's gotta be it!

Car won't start now -_-

[blinker_fluid]

the wires are yellow/black and yellow/blue for a sohc chassis not sure where the plug goes b/c the fsm doesn't have a harness layout.

[Clawhammer]

Car starts, speedo/odo work. A WINNER IS ME!

[goalguy02]

Car starts, speedo/odo work. A WINNER IS ME!

Whoa Whoa! I wasn't even ready!!

Tell me what plug you plugged in and where!

Mine was a DOHC if it matters.

I O U.

[goalguy02]

Im confused.

After wiring in the two harness plugs from the KA harness behind the battery, into the SR harness, I have the Yellow/blue and Yellow/lavender wires (as well as some other wires) left over with no matching colors on the SR harness. The SR harness has some left over wires but nothing that matches colors.

I need to find out what the SR wires are for.

[Clawhammer]

^It's hard to see so I traced the route with a red line. From the VSS plug it goes into the lower engine harness and then out into a plug that has 8 holes on it. Mine only used 7 of those holes however. You can see the VSS wires have not changed color. On the right side of the plug I pointed out the hole that had no wire in it (on each side). All the colors should match up when you plug it in.

Hope your fix is as easy as mine!

Now I'm wondering what the three plugs on the short side of my fusebox are for because none of them are plugged in.

[goalguy02]

Was you plug just not connected? My plug is already connected. I'll post up some pictures in a sec.

Also, do you have the left over wires behind the battery like I do?

My plug connected



Left over wires (including yelloww/blue and yellow w/ lavender